linux-kernel - Re: [PATCH] mmc: sdhci-sprd: Fix the limitation of div

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Date:   Wed, 21 Sep 2022 14:48:26 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Wenchao Chen <wenchao.chen666@...il.com>
Cc:     adrian.hunter@...el.com, orsonzhai@...il.com,
        baolin.wang@...ux.alibaba.com, zhang.lyra@...il.com,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        megoo.tang@...il.com, lzx.stg@...il.com
Subject: Re: [PATCH] mmc: sdhci-sprd: Fix the limitation of div

On Wed, 14 Sept 2022 at 08:37, Wenchao Chen <wenchao.chen666@...il.com> wrote:
>
> From: Wenchao Chen <wenchao.chen@...soc.com>
>
> Because the bit field size of the divider coefficient register is 1023, it is
> limited before returning the value.
>
> Signed-off-by: Wenchao Chen <wenchao.chen@...soc.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sdhci-sprd.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
> index f33e9349e4e6..46c55ab4884c 100644
> --- a/drivers/mmc/host/sdhci-sprd.c
> +++ b/drivers/mmc/host/sdhci-sprd.c
> @@ -205,14 +205,14 @@ static inline u32 sdhci_sprd_calc_div(u32 base_clk, u32 clk)
>         if ((base_clk / div) > (clk * 2))
>                 div++;
>
> -       if (div > SDHCI_SPRD_CLK_MAX_DIV)
> -               div = SDHCI_SPRD_CLK_MAX_DIV;
> -
>         if (div % 2)
>                 div = (div + 1) / 2;
>         else
>                 div = div / 2;
>
> +       if (div > SDHCI_SPRD_CLK_MAX_DIV)
> +               div = SDHCI_SPRD_CLK_MAX_DIV;
> +
>         return div;
>  }
>
> --
> 2.17.1
>